CRA Audit (2025): What Triggers It and How Calgary Business Owners Should Respond

Understanding How CRA Selects Calgary Business Owners for Audit

Receiving a letter from the Canada Revenue Agency requesting information about your tax return is unsettling for most Calgary business owners — but it's important to understand that not every CRA inquiry is a full audit. CRA conducts several types of reviews, from simple matching exercises that flag discrepancies between your return and third-party slips, to comprehensive audits of your business income and deductions over multiple years. Working with an experienced Calgary CPA during a CRA review can help protect your position and ensure your response is complete and accurate — book a consultation with our Calgary team.

CRA selects returns for audit through a combination of automated risk-scoring systems, random selection, industry-wide audit campaigns, tips from third parties, and matching of reported income against third-party data. Understanding what puts a return on CRA's radar helps you file accurately — and understand what documentation to have ready if questions arise. If you're unsure how your current filings compare to CRA's risk criteria, speaking with a Calgary accountant can clarify your position quickly.

Common Audit Triggers

While CRA doesn't publish its exact selection criteria, these factors are known to increase audit risk:

• Large or disproportionate deductions: Home office expenses that represent an unusually high percentage of income, or business expenses that significantly exceed industry norms, attract scrutiny.
• Recurring losses: A business that reports losses year after year without evidence of a reasonable expectation of profit may be reviewed for hobby loss disallowance.
• Rental income discrepancies: CRA cross-references land title data, utility registrations, and Airbnb data to identify unreported rental income.
• Self-employment income: Cash-based businesses and high-deduction industries (construction, food service, personal services) are consistently higher audit targets.
• Large charitable donations: Donations that are a very high percentage of net income relative to historical patterns draw additional verification requests.
• Unreported foreign income or assets: T1135 non-filers and inconsistencies with CRA's international data-sharing programs trigger reviews.
• GST/HST discrepancies: Significant differences between reported GST and income tax revenues for the same period raise flags.
• Prior audit history: Taxpayers who had prior audits with adjustments are more likely to be selected again.
• Third-party tips: Disgruntled employees or former business partners sometimes report suspected non-compliance.

Types of CRA Examinations

Type	What It Is	Scope
Desk audit / review	CRA requests information by mail	Usually one specific claim or income type
Field audit	CRA auditor visits your premises or requests records	One or more fiscal years, possibly full return
Net worth audit	CRA reconstructs income by comparing your net worth (assets minus liabilities) at the start and end of a period — used when income can't be traced through conventional records	Reserved for cash-intensive businesses where records are absent or unreported income is suspected
GST/HST audit	Review of GST filings and ITC claims	Specific reporting periods
Payroll audit	Review of source deductions and T4s	Employer records and remittances

A net worth audit is the most intensive review CRA conducts. Rather than examining invoices line by line, CRA compares your net worth at two points in time — if it grew more than your declared income can explain, the difference is treated as unreported income. These reviews commonly demand personal bank statements, mortgage records, vehicle purchases, and broader lifestyle evidence, and professional representation is essential at this stage.

Shareholder Loans: A Leading Corporate Audit Trigger

For incorporated Calgary businesses, outstanding shareholder loan balances are one of the most common triggers for a T2 corporate audit. Under the Income Tax Act, funds withdrawn from a corporation by a shareholder must be repaid within the year following the fiscal year of withdrawal, included in income, or properly structured as salary or dividends. A shareholder loan balance that remains outstanding at the end of two consecutive fiscal years is a significant red flag CRA actively watches for.

RRSP and TFSA Overcontributions

CRA also cross-references registered account contribution data directly from financial institutions, so overcontributions are detected quickly and can trigger a formal review. For 2025, the RRSP deduction limit is $32,490 and the TFSA contribution room is $7,000 for the year. Contributions in excess of these limits trigger penalty assessments in addition to review risk.

CPP and Payroll Audit Considerations

CRA also conducts payroll audits to verify employers have correctly calculated and remitted CPP contributions, EI premiums, and income tax withholdings. For 2025, the CPP Year's Maximum Pensionable Earnings (YMPE) is $71,300. Misclassifying employees as independent contractors is one of the most common payroll audit triggers and can result in substantial retroactive assessments covering both the employer and employee portions of CPP.

How to Respond to a CRA Audit

Receiving an audit notification does not mean CRA has concluded you owe more tax. It means they want to verify information. Here's how to respond effectively:

1. Read the letter carefully: CRA's initial contact letter specifies exactly what they're reviewing and what documents they need. Respond only to what's asked — don't volunteer additional information.
2. Gather your records: Assemble all supporting documentation for the items under review — receipts, invoices, bank statements, agreements, log books, and any other evidence that supports your claimed amounts.
3. Meet deadlines: CRA sets response deadlines in their audit letters. Missing these deadlines can result in arbitrary assessments. Request an extension if you need more time — CRA generally accommodates reasonable requests.
4. Get professional representation: A tax professional can represent you before CRA, communicate on your behalf, and ensure your responses are accurate, complete, and legally protective. Having a professional involved typically results in more efficient resolution.

Your Rights as a Canadian Taxpayer During a CRA Audit

The Taxpayer Bill of Rights gives Canadian taxpayers important protections during CRA audits:

• The right to be treated with courtesy, consideration, and respect
• The right to receive complete and accurate information in official languages
• The right to have CRA keep your information confidential
• The right to formal review and appeal of CRA decisions
• The right to be represented by an authorized agent (such as a tax professional) — formalized through a signed AUT-01, T1013, or RC59 authorization so your accountant can manage all communications directly with CRA on your behalf
• The right to put an auditor's requests in writing and respond in writing, creating a clear record of what was asked and what was provided

If you disagree with a CRA reassessment, you have the right to file a Notice of Objection within 90 days of the assessment date (or one year after your filing deadline for that year, whichever is later). Filing an objection suspends collection action on the disputed amount while the CRA's Appeals Division — independent of the audit function — reviews your case fresh. If the Appeals Division upholds the reassessment, you can escalate to the Tax Court of Canada: the Informal Procedure for disputes under $25,000 in tax, or the General Procedure for larger amounts. Many disputes are resolved at the objection stage without ever reaching court.

How Far Back Can CRA Reassess You?

CRA's ability to reassess a return is not unlimited. For most individuals and Canadian-controlled private corporations, the normal reassessment period is three years from the date of the original Notice of Assessment. If CRA determines there was a misrepresentation attributable to neglect, carelessness, or wilful default, that window extends to six years. Where fraud or tax evasion is established, there is no time limit at all — CRA can reach back indefinitely. This is one of the strongest reasons accurate filing matters more than most taxpayers assume, and why retaining supporting records for at least six years is standard practice.

Penalties are not automatic when CRA finds an error. An honest mistake typically results in a reassessment plus arrears interest only. The gross negligence penalty under subsection 163(2) of the Income Tax Act — equal to 50% of the understated tax — is reserved for cases where CRA concludes the taxpayer was wilfully blind or negligent. Proactively correcting errors through the Voluntary Disclosures Program before an audit begins can significantly reduce or eliminate these penalties.

Swift Accounting Stands With You Through CRA Reviews

A CRA audit doesn't have to be overwhelming. With proper preparation, accurate records, and experienced corporate tax representation, the vast majority of audits conclude with no additional tax owing — or minor adjustments. The single most effective audit defence is professional bookkeeping in Calgary that keeps your records organized, reconciled, and CRA-ready throughout the year. Swift Accounting has guided many Calgary business owners through CRA reviews, desk audits, and formal objection processes. Many Calgary business owners find it's worth reviewing their CRA risk exposure with their accountant before year-end. If you've received a CRA letter or want to ensure your returns can withstand scrutiny, book a consultation with our Calgary team.